Photo: Don Ramey Logan · CC BY-SA 4.0Avalon’s winters are milder than most of the U.S.; July afternoons average 79°
A typical July afternoon reaches 79°, a January night drops to 50°.
A year in Avalon at a glance
Each month’s typical high and low, and what it brings.
What stands out about Avalon’s climate
Compared with towns across the U.S., with Avalon’s place in California beside it.
What a year in Avalon feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost dates and degree days from Avalon Catalina Airport, 7 miles away.
The 2023 USDA map puts Avalon’s center in zone 10b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 38°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 14 inches of rain a year
February is the wettest month and August the driest.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Avalon
73% of the work is heating. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Avalon Catalina Airport.
Living with Avalon’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10b. Frost almost never comes, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, May, June, July, August, September, October, November and December. 9.0 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Avalon from natural hazards, river flooding is the largest share (77%). Normals are averages; the hazards page covers the extremes.
Natural hazards →Avalon and similar climates
TownRatings has no climate map of the towns around Avalon yet.
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Avalon averaged 2.1° warmer than the 1900s. The biggest change is in January (+2.8°).
A bigger shift than in 92% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Avalon compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Avalon’s place among California’s.
Avalon weather by month
Highs, lows and precipitation from NOAA’s grid at Avalon’s center. 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 66° | 50° | 2.9" | 54° – 63° |
| February | 65° | 49° | 3.3" | 53° – 62° |
| March | 67° | 51° | 1.9" | 53° – 65° |
| April | 69° | 52° | 0.8" | 56° – 64° |
| May | 71° | 55° | 0.3" | 59° – 68° |
| June | 75° | 58° | 0.1" | 63° – 70° |
| July | 79° | 62° | 0.0" | 67° – 76° |
| August | 81° | 63° | 0.0" | 69° – 75° |
| September | 80° | 63° | 0.1" | 68° – 77° |
| October | 75° | 59° | 0.4" | 63° – 74° |
| November | 70° | 54° | 1.0" | 56° – 66° |
| December | 65° | 50° | 2.9" | 54° – 61° |
| Year | 72° | 55° | 13.6" |
How much a month can swing
A normal is an average. March swings the most: from 1991 to 2020 its average ranged from 53° to 65°. August is the most reliable, staying within 7°.
Where Avalon’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Avalon’s center.
- Frost dates, heating and cooling: Avalon Catalina Airport, 7 miles away.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Avalon’s climate
What is the weather like in Avalon?
A typical July afternoon reaches 79°, a January night drops to 50°. Milder January nights than 97% of U.S. towns; cooler July afternoons than 94% of U.S. towns.
How cold does it get in Avalon in winter?
February nights average 49°. A night at 32° or below comes in only some winters (0.0 a year on average). In the coldest February of the last 30 years the month averaged 53°.
How hot does it get in Avalon?
July, with a typical high of 79° and a low of 62°. About 14 days a year reach 90° (Avalon Catalina Airport).
When is the first and last frost in Avalon?
Most years have no frost at all: a 32° night comes in about 0% of winters at Avalon Catalina Airport, usually in December or January.
What growing zone is Avalon in?
Zone 10b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 38°.
What is the best time of year to visit Avalon?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, May, June, July, August, September, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Avalon getting warmer?
Yes: 1991–2020 averaged 2.1° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Avalon.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.